diff options
| author | Kevin O'Connor <kevin@koconnor.net> | 2010-05-01 19:25:41 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2010-05-01 19:25:41 -0400 |
| commit | 5718d5662d33355403e7aa62227acecac1755a4f (patch) | |
| tree | 87fa44b66ffc078a12484251833a4df0a609a642 | |
| parent | e438b0c6202ab7e2c55f4e9bf4db0bc176e5c544 (diff) | |
| download | seabios-5718d5662d33355403e7aa62227acecac1755a4f.tar.gz | |
Document usb-hid.c functions.
| -rw-r--r-- | src/usb-hid.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/usb-hid.c b/src/usb-hid.c index 67b5e546..f82965d7 100644 --- a/src/usb-hid.c +++ b/src/usb-hid.c @@ -17,6 +17,7 @@ struct usb_pipe *keyboard_pipe VAR16VISIBLE; * Setup ****************************************************************/ +// Send USB HID protocol message. static int set_protocol(struct usb_pipe *pipe, u16 val) { @@ -29,6 +30,7 @@ set_protocol(struct usb_pipe *pipe, u16 val) return send_default_control(pipe, &req, NULL); } +// Send USB HID SetIdle request. static int set_idle(struct usb_pipe *pipe, int ms) { @@ -93,6 +95,7 @@ usb_keyboard_setup(void) * Keyboard events ****************************************************************/ +// Mapping from USB key id to ps2 key sequence. static u16 KeyToScanCode[] VAR16 = { 0x0000, 0x0000, 0x0000, 0x0000, 0x001e, 0x0030, 0x002e, 0x0020, 0x0012, 0x0021, 0x0022, 0x0023, 0x0017, 0x0024, 0x0025, 0x0026, @@ -109,6 +112,7 @@ static u16 KeyToScanCode[] VAR16 = { 0x0048, 0x0049, 0x0052, 0x0053 }; +// Mapping from USB modifier id to ps2 key sequence. static u16 ModifierToScanCode[] VAR16 = { //lcntl, lshift, lalt, lgui, rcntl, rshift, ralt, rgui 0x001d, 0x002a, 0x0038, 0xe05b, 0xe01d, 0x0036, 0xe038, 0xe05c @@ -116,12 +120,14 @@ static u16 ModifierToScanCode[] VAR16 = { #define RELEASEBIT 0x80 +// Format of USB event data struct keyevent { u8 modifiers; u8 reserved; u8 keys[6]; }; +// Translate data from KeyToScanCode[] to calls to process_key(). static void prockeys(u16 keys) { @@ -139,6 +145,7 @@ prockeys(u16 keys) process_key(keys); } +// Handle a USB key press/release event. static void procscankey(u8 key, u8 flags) { @@ -149,6 +156,7 @@ procscankey(u8 key, u8 flags) prockeys(keys | flags); } +// Handle a USB modifier press/release event. static void procmodkey(u8 mods, u8 flags) { @@ -161,6 +169,7 @@ procmodkey(u8 mods, u8 flags) } } +// Process USB keyboard data. static void noinline handle_key(struct keyevent *data) { @@ -225,6 +234,7 @@ handle_key(struct keyevent *data) SET_EBDA2(ebda_seg, usbkey_last.data, old.data); } +// Check for USB events pending - called periodically from timer interrupt. void usb_check_key(void) { |